Sometimes her subjects are matters of news and culture - the art of the crossword; the banning of puns in China. Sometimes they are historically significant - the battle of Bic and Biro for eponymous supremacy; 18th century attempts to make the workings of English a little more sensical. Presenting us with familiar words and quirks of grammar and turns of phrase, her investigations reveal even the least of them - even, literally, the spaces between words - to be surprisingly cool and strange. Eminently digestible at 15 minutes or so each week, it's funny and unpretentious, and you will want Zaltzman for a friend. A tonic.